I think the .222 tends to be one of those cartridges that is very easy to load for. Many different powders seem to work well in them, but its projectile range is narrowish.......... given that many have slow twists this narrows it down to the 50 to 55 grain projo range for most older rifles.
Of course you can muck about and dissect to the nnth degree to get hair splitting accuracy. But most seem to shoot MOA at a minmum with almost any 50 to 55 grain bullet filled up to the base of the neck with a suitable powder. ( thats a broad statement re the powder and take from it what you will )
I use the cheap 55 grain Hornady soft point with a cannelure and have used AR 2208 a lot, anywhere between 23 and 24 grains.
But many similar burn rate powders will do the same. Good 'ol W748 is good too ( and cheap to burn / practice with.)
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